Health has been defined by the World Health Organisation (WHO) as the "state of complete physical, mental and social well-being and not merely the absence of disease or infirmity". Hence, to promote the wellbeing of all human beings, the World Health Day is celebrated every year on April 7, marking the founding anniversary of WHO. This day provides an opportunity for the organisation to rally action around a specific health topic of concern to people all over the world. This year, the theme of the campaign is Depression: let's talk.The condition has seen an alarming rise in the country, as more Indians than ever carry the burden of the illness today.

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